Fig. 1. Schematic diagram of adaptive dual-comb spectroscopy analysis system

Fig. 2. Output spectrum and nonlinear broadening of two pulse lasers

Fig. 3. (a) Signal positions between comb lines of pusled lasers and central frequency of CW lasers in frequency domain; (b) RF signal processing principle

Fig. 4. Slow drifts of comb line. (a) Stabilization of repetition rates; (b) central frequency shift of the CW laser versus the control voltage; (c) beat frequency signal stability

Fig. 5. (a) Time domain sampling signal, the illustration is a partial magnification; (b)time domain signal FFT processing; (c) comparison of acetylene transmission spectrum and HITRAN database in experiment

Fig. 6. (a) Signals sampled with fixed clock; (b) signals sampled with adaptive clock